Water-heater



PATENT (muela,`

CHARLES G. JEVETT, OF HOWELL, MICHIGAN- WATER-HEATER..

SPECIFICATION forming part of Letters Patent No, 384,695, dated June 19,1888.

Application filed February 2, 1888. Serial No. 262,729. (No model.)

To all whom it may concern:

Bc it known that I, CrrAnLns G. JEWETT, a

citizen of the United States, residing at Howell, in the county ofLivingston and State of Michigan, haveinvented certain new and usefulImprovements inWater Heaters and Girculators, of which the following isa specification, reference being had therein to the accom panyingdrawings. y

This invention relates to certain new and useful improvements in waterheaters and circulators, and the invention consists' in the peculiarconstruction and arrangement of the parts, as more fully hereinafterdescribed.

In the drawings which accompany this speciiieation, Figure l is avertical central section of my improved heater, and Fig. 2 `is a topplan thereof.

A is the base or ash-pit section of the heater, provided with the usualdraft-door, B, and supporting the heater and the grate C, which lattermay be of any suitable construction.

The heater consists of three concentric shells, D E F, which formbetween them two annular waterchambers, G and II. The outer waterehamberextends the whole height of the heater. The inner annular water-chambercommunicates with the outer annular chamber at or near the bottom of theheater, and extends only about the height of the furnace-chamber proper,of which the inner shell forms the walls.

-I is a ledge formed by the junction of the inner shells, E and F, andabove this ledge is placed the usual feed-door, JJ

K are circulating-coils arranged in vertical series in the space abovethe furnace. Each coil forms aheliX, preferably slightly conical, withthe ends of each helix terminating in vertical risers L K, the outer oneextendingdownward and connecting into the top of the inner annularWaterchamber, and the inner one extending upward from the eye of thehelix to or near the top of the heater, and then extending lat erallyand connecting into the outer annular water-chamber, at or near the topthereof. The helices may be all alike; but they are preferably placed todistribute the risers equally around the circumference and the center,as this arrangement makes the circulation in the heater equal and givesthe best exposure of The incoming and outgoing connections S 'I V forthe radiating system are arrangedin the usual manner-that is, with thehighest and lowest part of the heater, respectively.

The advantage of my heater consists, mainly, in the peculiar arrangementand construction of its heating-surface, which presents a large extentto the direct action of the heat of the furnace, as the dame and hotgases of combustion can freely circulate around and through the coilsand also maintains a very efficient circulation, as it is apparent thatthe inner annular water-chamber temporarily traps a quantity of waterand exposes it at the point of lowest temperature to the most directheat from the burning fuel, and then sends it through a series ofchannels, in which its temperature is quickly raised to the highestpint-to the top of the heater-where it enters the radiat ing-circuit.

The communication between the annular water-chambers G I-I is preferablyestablished by not extending the shell E quite to the bottom of theheater, so as to establish communi cation between the two chambers allaround, which facilitates the circulation.

XVhat I claim as my invention is 1. Ina water heater and circnlator, thecombination of three concentric shells arranged to form two annularwater-chambers communi eating with each other at the bottom, the outerchamber extending the height of the heater and the inner chamber theheight of the furnace, and heating-coils connecting the top of the innerchamber with the top of the outer one, substantially as described.

2. In a water heater and circulator, the combination of three concentricshells arranged to form an outer and an inner annular waterchamberopeninginto each other at the bottom, the outer chamber extending to thetop of the IOO heater and the inner one to the top ofthefurnace-chamber, and helical heating coils in vertical series andarranged to connect the tops of the two water-chambers, substantially asdescribed.

8. In a water heater and circulator, the combination of three concentricshells arranged to form an outer and an inner annular waterchamberopening into each other at the bottom, the outer chamber extending theheight of the heater and the inner one the height of the furnace, aledge formed on top of the inner chamber, and heating-coils arranged inVertical series, said coils consisting of conical helices terminating indownwardly-extending risers at the outer endswhich connect with the topof the inner chamber, and in upwardlyextending risers at their innerends which eX- tend upwardly and then laterally to connect with the topof the outer chamber, substantially as described.

4. In a Water heater and circulator, the combination, With the annularwater chamber or chambers, of a series of substantially horizontalcirculating heating-coils arranged in a vertical series, each coilhaving` its inner end eX- tended upwardly and connected to the top ofthe waterehamber and its outer end extending downwardly and connected tothe bottom of the water-chamber, substantially as described.

In testimony whereof I afiix my signature, in presence of two witnesses,this 10th of January, 1888. Y

CHARLES G. JEVE'IT.

Vitnesses:

J As. WHITTEMORE, P. M. HULBERT.

